ROANOKE COUNTY, Va. – UPDATE
All lanes are now open.
UPDATE
One northbound lane is now open. The fire is extinguished.
No one is hurt.
ORIGINAL STORY
Crews are working to extinguish a tractor-trailer fire that's causing a traffic issue on I-81 North on Tuesday morning.
All northbound lanes are blocked at mile marker 132, which is near the Dixie Caverns exit in Roanoke County.
The call came in just after 4 a.m.
Drivers should avoid the area.
Roanoke County emergency crews and Virginia State Police are responding.
Check back for more details.